In this posting I showed you how you can quickly produce good results when combining jQuery and ASP.NET controls without pushing to the limits. JQuery components and ASP.NET controls have both their strong sides and weaknesses. Seems very basic but it is not hard to make it look more professional using style sheets. I applied some more bells and whistles and sample data to source code to make my sample more informative. In this function we are free to use node text and value as we like. Instead of postback our callback function is used and provided with selected values. Now we have TreeView that renders nodes the way that postback doesn’t happen anymore. Node.NavigateUrl = "javascript:selectNode('" + node.Value + Private void SetSelectNodeUrls( TreeNodeCollection nodes) protected override void OnPreRender( EventArgs e) You get the better idea why I did so if you look at server-side code that corrects NavigateUrl properties of TreeView nodes. Notice that this function returns undefined. Īlert( "You selected: " + value + " - " + text) Also we have to make sure that this function returns something that is not processed by browser. We have to make sure that when user clicks the node then information is sent to some JavaScript function. We solve these to problems at same time: let’s move to JavaScript links. Also we need to find a way how to let our client-side code to know that something was selected from TreeView. Number one problem is getting over the postbacks because in our scenario postbacks only screw up things. This example works for you if you need something done quickly. For more advanced scenarios I suggest you to use some jQuery based tree component. Be warned that if you need more than I show you here you need to write a lot of JavaScript code. TreeView needs some little hacking to make it work as client-side component. If you are going to use it in some real-world application then this mark-up gets even shorter – I am sure that in most cases the data you display in TreeView comes from database or some domain specific data source. Notice that our mark-up is very compact for what we will achieve. Here is the mark-up of our form’s main content area. I add some jQuery based JavaScript to my page head to get dialog and button work. If you are not sure how to include jQuery UI to your page then take a look at source code – GitHub also allows you to browse files without downloading them. In this posting I will show you how to use ASP.NET TreeView control and jQuery UI dialog component to build picker dialog that hosts tree data.Īs I don’t like to invent wheels then I will use jQuery UI to solve the question related to dialogs. the TreeView control contains a selected image.Selecting things from dialogs and data represented as trees are very common things we see in business applications. the TreeView control contains a selected image.) (Assumes that imageList1 contains at least two images and ' the TreeView control contains a selected image.) ' (Assumes that ImageList1 contains at least two images and To open the TreeNode Editor, click the ellipsis button ( ) next to the Nodes property on the Properties window. These properties can be set in code, or within the TreeNode Editor. The ImageIndex property determines the image displayed for the node's normal and expanded states, and the SelectedImageIndex property determines the image displayed for the node's selected state. Set the node's ImageIndex and SelectedImageIndex properties. These properties can be set in the designer with the Properties window, or in code. Set the TreeView control's ImageList property to the existing ImageList control you wish to use. To work around this bug, call Application.DoEvents in your Main method immediately after calling EnableVisualStyles. NET Framework version 1.1 prevents images from appearing on TreeView nodes when your application calls Application.EnableVisualStyles.
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